US3418777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roofing
Assignee: Individual
•
Filing: 1967-03-29
•
Granted: 1968-12-31
•
Expires: 1987-03-29
Abstract
No abstract record available.
Inventors
- 👤 Donald M Gillis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:29
CPC Classifications
E; E04; E04D; E04D12/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US622417A
Cited
US640511A
Cited
US1590744A
Cited
US1963583A
Cited
US2149818A
Cited
US2535620A
Cited
US2659323A
Cited
US3232020A
Cited
US3237360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |