US3251809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure-sensitive tape backings
Assignee: 3M Co
•
Filing: 1962-12-20
•
Granted: 1966-05-17
•
Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 Robert G Lockwood
- 👤 Courtland L Agre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:50
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/20; C09; C09J; C09J7/00; C09J7/20; C09J7/22; C09J7/25; C09J7/255; Y; Y10; Y10S; Y10S206/00; Y10S206/819
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
BIAXIALLY TENSILIZED FILM OF NON-LINEAR, HIGHLY POLYMERIC POLESTER WHICH COMPRISES THE CONDENSATION PRODUCT OF (1) DICARBOXYLIC ACID, 90 TO 100 MOLE PERCENT OF WHICH IS TEREPHTHALIC ACID AND 10 TO 0 MOLE PERCENT OF WHICH IS ANOTHER DICARBOXYLIC ACID, THE GLYCOL ESTER OF WHICH IS STABLE AT A TEMPERATURE OF 230*C., (2) POLYMETHYLENE GLYCOL OF THE FORMULA
Claim 2
Dependent Claim
57 words
BIAXIALLY TENSILIZED FILM OF NON-LINEAR, HIGHLY POLYMERIC POLESTER WHICH COMPRISES THE CONDENSATION PRODUCT OF (1) DICARBOXYLIC ACID, 90 TO 100 MOLE PERCENT OF WHICH IS TEREPHTHALIC ACID AND 10 TO 0 MOLE PERCENT OF WHICH IS ANOTHER DICARBOXYLIC ACID, THE GLYCOL ESTER OF WHICH IS STABLE AT A TEMPERATURE OF 230*C., (2) POLYMETHYLENE GLYCOL OF THE FORMULA
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |