US3499457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tent
Assignee: Individual
•
Filing: 1967-07-31
•
Granted: 1970-03-10
•
Expires: 1987-07-31
Abstract
No abstract record available.
Inventors
- 👤 Raymond Hugh Waring
- 👤 David Malcolm Brohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:55
CPC Classifications
E; E04; E04H; E04H15/00; E04H15/32; E04H15/34; E04H15/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1820002A
Cited
US2928404A
Cited
US3059658A
Cited
US3168101A
Cited
US3181542A
Cited
US3374797A
Cited
US3351078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |