Patent US2880829A successfully refreshed from Google Patents.
US2880829A
Expired / Lapsed
US
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Anti-climbing shield for towers
Assignee: Individual
•
Filing: 1956-06-22
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Granted: 1959-04-07
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Expires: 1976-06-22
Abstract
No abstract record available.
Inventors
- 👤 David T Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:29
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/006; E04; E04H; E04H12/00; E04H12/02; E04H12/08; E04H12/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US142082A
Cited
US1141919A
Cited
US1177513A
Cited
US1618312A
Cited
US2034709A
Cited
US2515818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |