US3138373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat construction
Assignee: American Metal Products Co
•
Filing: 1961-02-24
•
Granted: 1964-06-23
•
Expires: 1981-02-24
Abstract
No abstract record available.
Inventors
- 👤 Hyland C Flint
- 👤 Robert K Mclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:45
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/30
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
IN A SPRING SECTION, AN UPPER LOAD BEARING SEATING PORTION, A COIL OF A PLURALITY OF TURNS FORMING A SUPPORT FOR THE FRONT END OF SAID PORTION, A COIL OF LESS NUMBERS OF TURNS AT THE REAR END OF SAID PORTION, AND A REAR PIVOTAL ATTACHING PORTION HAVING A FORWARDLY EXTENDING CRANK ARM PROJECTING LATERALLY OF THE SEATING PORTION SAID CRANK ARM BEING ENGAGEABLE WITH AN ADJACENT SPRING ELEMENT UPON WHICH IT RESTS.
References Cited (Backward Citations)
US2870823A
Cited
US2285827A
Cited
US2591185A
Cited
GB780282A
Cited
US3087719A
Cited
US3106389A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |