US3103034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door closure apparatus
Assignee: Individual
•
Filing: 1960-09-15
•
Granted: 1963-09-10
•
Expires: 1980-09-15
Abstract
No abstract record available.
Inventors
- 👤 John L Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:56
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/04; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
DOOR CLOSURE APPARATUS COMPRISING, A HOUSING, A COIL SPRING WITHIN SAID HOUSING FORMED OF OVERLAPPING SUCCESSIVE CONVOLUTIONS OF RESILIENT MATERIAL, A MEMBER FIXED RELATIVE TO SAID SPRING AND RECTILINEARLY MOVABLE RELATIVE TO SAID HOUSING, AND MOUNTING MEANS FOR SAID SPRING COMPRISING MEANS PROVIDING A TRACK WITHIN SAID HOUSING EXTENDING TRANSVERSELY OF THE DIRECTION OF MOVEMENT OF SAID MEMBER AND SUPPORT MEANS FOR SAID COIL SPRING OPERABLE IN SAID TRACK TO PERMIT OF MOVEMENT OF SAID SPRING NORMAL TO THE DIRECTION OF MOVEMENT OF SAID MEMBER TO INSURE ALIGNMENT OF UNWOUND RESILIENT MATERIAL WITH THE DIRECTION OF MOVEMENT OF SAID MEMBER.
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) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |