US2722901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof structure
Assignee: Individual
•
Filing: 1949-06-10
•
Granted: 1955-11-08
•
Expires: 1969-06-10
Abstract
No abstract record available.
Inventors
- 👤 Hugh B Johnson
- 👤 Mcgaughan Alexander Stanley
- 👤 Weidlinger Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:52
CPC Classifications
E; E04; E04B; E04B7/00; E04B7/02; E04B7/04; E04B7/045; E04B9/00; E04B9/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1062994A
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US1536977A
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GB360244A
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US2049863A
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US2169388A
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US2200636A
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US2183381A
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US2263354A
Cited
US2231216A
Cited
US2480699A
Cited
US2427021A
Cited
US2548758A
Cited
US2612854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |