US3227592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaping of non-woven batts
Assignee: Celanese Corp
•
Filing: 1959-04-02
•
Granted: 1966-01-04
•
Expires: 1979-04-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert W Coates
- 👤 Donald T Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:55
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; B; B01; B01D; B01D39/00; B01D39/14; B01D39/16; B01D39/1607; B01D39/1623; D04H1/70; D04H1/72; D04H1/732; B01D2239/00; B01D2239/10; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/102; Y10T156/1021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
THE PROCESS OF MAKING AIR FILTERS FROM A PLANE, NONWOVEN BONDED BATT CONTAINING THERMOPLASTIC FIBERS, COMPRISING THE STEPS OF INTERLACING SAID BATT ALTERNATINGLY WITH THE INDIVIDUAL BARS OF TWO SETS OF BARS ARRANGED IN SUBSTANTIALLY PARALLEL ROWS TO FORM A PLURALITY OF SUBSTANTIALLY SINUOUS LOOPS IN SAID BATT, HEATING SAID BATT TO SOFTEN THE SAME WHILE SAID BARS ARE IN CONTACT THEREWITH, COOLING SAID BATT TO EFFECT SETTING OF SAID LOOPS, AND EXTRACTING SAID BARS FROM SAID LOOPS.
Claim 2
Dependent Claim
52 words
THE PROCESS OF CLAIM 2, FURTHER COMPRISING THE STEP OF STITCHING AT LEAST ONE YARD TO THE APICES OF SAID LOOPS AT AT LEAST ONE FACE OF SAID BATT ALONG AT LEAST ONE LINE EXTENDING SUBSTANTIALLY TRANSVERSELY TO SAID LOOPS, TO THEREBY AFFIX SAID LOOPS TO ONE ANOTHER AND PREVENT SEPARATION THEREOF.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |