US3491985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Post anchor
Assignee: Individual
•
Filing: 1968-11-21
•
Granted: 1970-01-27
•
Expires: 1988-11-21
Abstract
No abstract record available.
Inventors
- 👤 Gail Grimsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:19
CPC Classifications
E; E04; E04H; E04H12/00; E04H12/22; E04H12/2207; E04H12/2215
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US684096A
Cited
US902802A
Cited
US931495A
Cited
US942369A
Cited
US1343544A
Cited
US1454649A
Cited
US1967460A
Cited
US2191124A
Cited
US3266778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |