US3336613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Life preserver
Assignee: Individual
•
Filing: 1965-05-13
•
Granted: 1967-08-22
•
Expires: 1985-05-13
Abstract
No abstract record available.
Inventors
- 👤 The Detroit Bank And T Company
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/08; B63C9/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A LIFE PRESERVER COMPRISING A PAIR OF LIKE UPPER AND LOWER SHELL HALVES OF ALUMINUM SHEET MATERIAL, EACH OF SAID SHELL HALVES HAVING A GENERALLY RECTANGULAR RING SHAPED CONFIGURATION IN PLAN WITH CONTINUOUS FLAT COPLANAR FLANGES PROJECTING FROM THE INNER AND OUTER PERIPHERIES OF THE RING, THE SHELL HALF BEING OF DOME-SHAPED TRANSVERSE CROSS SECTION BETWEEN THE FLANGES TO DEFINE AN ENCLOSED TUBULAR CHAMBER BETWEEN THE SHELL HALVES WHEN THE FLANGES OF THE TWO SHELL HALVES ARE PLACED IN FACE-TOFACE ENGAGEMENT WITH EACH OTHER, CONTINUOUS WELDMENTS SECURING THE FLANGES OF SAID SHELL HALVES TO EACH OTHER TO FORM A WATERTIGHT SEAL TO SAID CHAMBER, A PAIR OF LINE ATTACHMENT EYELETS SECURED TO THE ASSEMBLED SHELL HALVES INTERMEDIATE THE ENDS OF EACH OF THE TWO SHORTER SIDES OF THE RECTANGULAR RING CONFIGURATION, AND A REMOVABLE FABRIC SLEEVE FITTED ABOUT THE ASSEMBLED SHELL HALVES TO EXTEND ACROSS THE SPACE BETWEEN THE TWO LONGER SIDES OF THE RECTANGULAR RING CONFIGURATION.
Claim 2
Dependent Claim
157 words
A LIFE PRESERVER COMPRISING A PAIR OF LIKE UPPER AND LOWER SHELL HALVES OF ALUMINUM SHEET MATERIAL, EACH OF SAID SHELL HALVES HAVING A GENERALLY RECTANGULAR RING SHAPED CONFIGURATION IN PLAN WITH CONTINUOUS FLAT COPLANAR FLANGES PROJECTING FROM THE INNER AND OUTER PERIPHERIES OF THE RING, THE SHELL HALF BEING OF DOME-SHAPED TRANSVERSE CROSS SECTION BETWEEN THE FLANGES TO DEFINE AN ENCLOSED TUBULAR CHAMBER BETWEEN THE SHELL HALVES WHEN THE FLANGES OF THE TWO SHELL HALVES ARE PLACED IN FACE-TOFACE ENGAGEMENT WITH EACH OTHER, CONTINUOUS WELDMENTS SECURING THE FLANGES OF SAID SHELL HALVES TO EACH OTHER TO FORM A WATERTIGHT SEAL TO SAID CHAMBER, A PAIR OF LINE ATTACHMENT EYELETS SECURED TO THE ASSEMBLED SHELL HALVES INTERMEDIATE THE ENDS OF EACH OF THE TWO SHORTER SIDES OF THE RECTANGULAR RING CONFIGURATION, AND A REMOVABLE FABRIC SLEEVE FITTED ABOUT THE ASSEMBLED SHELL HALVES TO EXTEND ACROSS THE SPACE BETWEEN THE TWO LONGER SIDES OF THE RECTANGULAR RING CONFIGURATION.
References Cited (Backward Citations)
US3097374A
Cited
US3089153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |