Patent US3872592A successfully refreshed from Google Patents.
US3872592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twin blade injector unit
Assignee: Philip Morris USA Inc
•
Filing: 1974-01-30
•
Granted: 1975-03-25
•
Expires: 1994-01-30
Abstract
Abstract A blade unit adapted to be inserted in a standard single cutting edge injector type safety razor, the unit comprising a pair of superposed blades with an intervening spacer all permanently secured together, the spacer terminating short of the advance end of the unit and the blades at that end being capable of flexing toward each other.
Inventors
- 👤 Clemens A Iten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:35
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/14; B26B21/24; B29; B29C; B29C65/00; B29C65/56; B29C65/64; B29C65/645; B29C66/00; B29C66/70; B29C66/74; B29C66/742; B29L; B29L2031/00; B29L2031/718; B29L2031/7186
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
124 words
A safety razor injector blade unit adapted to be inserted in and fit a single edge injector razor, said unit comprising two thin blades each with a forward cutting edge and an intervening thin spacer, said blades and spacer being permanently secured together, the cutting edge of each blade extending for substantially the entire overall length of the respective blade, said unit having a first end adapted to be the advance end of the unit in insertion in the razor, the spacer occupying the major portion of the length of the unit but terminated short of said first end and the blade cutting edges, whereby upon insertion of the unit in a razor the corresponding ends of the blades may flex toward each other.
Claim 2
Dependent Claim
124 words
A safety razor injector blade unit adapted to be inserted in and fit a single edge injector razor, said unit comprising two thin blades each with a forward cutting edge and an intervening thin spacer, said blades and spacer being permanently secured together, the cutting edge of each blade extending for substantially the entire overall length of the respective blade, said unit having a first end adapted to be the advance end of the unit in insertion in the razor, the spacer occupying the major portion of the length of the unit but terminated short of said first end and the blade cutting edges, whereby upon insertion of the unit in a razor the corresponding ends of the blades may flex toward each other.
Claim 3
Dependent Claim
41 words
A safety razor injector blade unit in accordance with claim 1 in which the blades each have a thickness of not more than 0.008 of an inch, and the spacer has a thickness of not more than 0.010 of an inch.
Claim 4
Dependent Claim
28 words
A safety razor injector blade unit in accordance with claim 1 in whiCh the overall thickness of the unit is within the range below 0.025 of an inch.
Claim 5
Dependent Claim
37 words
A safety razor injector blade unit in accordance with claim 1 in which the blades each has a thickness of about 0.006 of an inch and the spacer has a thickness of about 0.008 of an inch.
Claim 6
Dependent Claim
38 words
A safety razor injector blade unit in accordance with claim 1 in which the spacer is terminated short of the advance end of the unit by a distance in the range of below about 150 of an inch.
Claim 7
Dependent Claim
36 words
A safety razor injector blade unit in accordance with claim 1 in which the forward cutting edge of the top one of the blades is set back of the forward cutting edge of the other blade.
Claim 8
Dependent Claim
30 words
A safety razor injector blade unit in accordance with claim 1 in which the lower blade has exposed openings therein between its cutting edge and the edge of the spacer.
Claim 9
Dependent Claim
169 words
A safety razor injector blade unit adapted to be inserted in and fit a single edge injector razor, said unit comprising two thin blades each having a thickness in the range of 0.004 to 0.008 of an inch and each having a forward cutting edge extending for substantially the entire overall length of the respective blade, and an intervening thin spacer having a thickness in the range of 0.006 to 0.010 of an inch, said blades and spacer being permanently secured together to form a unit having an overall thickness below 0.025 of an inch, said unit having a first end adapted to be the advance end of the unit in insertion in the razor, the spacer occupying the major portion of the length of the unit but terminated short of said first end and the blade cutting edges by a distance of about 1/16 of an inch, whereby upon insertion of the unit in an injector razor the corresponding ends of the blades may flex toward each other.
Claim 10
Dependent Claim
169 words
A safety razor injector blade unit adapted to be inserted in and fit a single edge injector razor, said unit comprising two thin blades each having a thickness in the range of 0.004 to 0.008 of an inch and each having a forward cutting edge extending for substantially the entire overall length of the respective blade, and an intervening thin spacer having a thickness in the range of 0.006 to 0.010 of an inch, said blades and spacer being permanently secured together to form a unit having an overall thickness below 0.025 of an inch, said unit having a first end adapted to be the advance end of the unit in insertion in the razor, the spacer occupying the major portion of the length of the unit but terminated short of said first end and the blade cutting edges by a distance of about 1/16 of an inch, whereby upon insertion of the unit in an injector razor the corresponding ends of the blades may flex toward each other.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |